<template>
  <view class="uni-countdown">
    <view
      v-if="showDay"
      :style="{borderColor:borderColor, color:color, background:backgroundColor}"
      class="uni-countdown__number">{{ d }}</view>
    <view
      v-if="showDay"
      :style="{color:splitorColor}"
      class="uni-countdown__splitor">天</view>
    <view
      :style="{borderColor:borderColor, color:color, background:backgroundColor}"
      class="uni-countdown__number">{{ h }}</view>
    <view
      :style="{color:splitorColor}"
      class="uni-countdown__splitor">{{ showColon ? ':' : '时' }}</view>
    <view
      :style="{borderColor:borderColor, color:color, background:backgroundColor}"
      class="uni-countdown__number">{{ i }}</view>
    <view
      :style="{color:splitorColor}"
      class="uni-countdown__splitor">{{ showColon ? ':' : '分' }}</view>
    <view
      :style="{borderColor:borderColor, color:color, background:backgroundColor}"
      class="uni-countdown__number">{{ s }}</view>
    <view
      v-if="!showColon"
      :style="{color:splitorColor}"
      class="uni-countdown__splitor">秒</view>
  </view>
</template>
<script>
export default {
  name: 'UniCountdown',
  props: {
    showDay: {
      type: Boolean,
      default: true
    },
    showColon: {
      type: Boolean,
      default: true
    },
    backgroundColor: {
      type: String,
      default: '#FFFFFF'
    },
    borderColor: {
      type: String,
      default: '#000000'
    },
    color: {
      type: String,
      default: '#000000'
    },
    splitorColor: {
      type: String,
      default: '#000000'
    },
    day: {
      type: Number,
      default: 0
    },
    hour: {
      type: Number,
      default: 0
    },
    minute: {
      type: Number,
      default: 0
    },
    second: {
      type: Number,
      default: 0
    }
  },
  data () {
    return {
      timer: null,
      d: '00',
      h: '00',
      i: '00',
      s: '00',
      leftTime: 0,
      seconds: 0
    }
  },
  created: function (e) {
    this.seconds = this.toSeconds(this.day, this.hour, this.minute, this.second)
    this.countDown()
    this.timer = setInterval(() => {
      this.seconds--
      if (this.seconds < 0) {
        this.timeUp()
        return
      }
      this.countDown()
    }, 1000)
  },
  beforeDestroy () {
    clearInterval(this.timer)
  },
  methods: {
    toSeconds (day, hours, minutes, seconds) {
      return (day * 60 * 60 * 24) + (hours * 60 * 60) + (minutes * 60) + seconds
    },
    timeUp () {
      clearInterval(this.timer)
      this.$emit('timeup')
    },
    countDown () {
      let seconds = this.seconds
      let [day, hour, minute, second] = [0, 0, 0, 0]
      if (seconds > 0) {
        day = Math.floor(seconds / (60 * 60 * 24))
        hour = Math.floor(seconds / (60 * 60)) - (day * 24)
        minute = Math.floor(seconds / 60) - (day * 24 * 60) - (hour * 60)
        second = Math.floor(seconds) - (day * 24 * 60 * 60) - (hour * 60 * 60) - (minute * 60)
      } else {
        this.timeUp()
      }
      if (day < 10) {
        day = '0' + day
      }
      if (hour < 10) {
        hour = '0' + hour
      }
      if (minute < 10) {
        minute = '0' + minute
      }
      if (second < 10) {
        second = '0' + second
      }
      this.d = day
      this.h = hour
      this.i = minute
      this.s = second
    }
  }
}
</script>
<style lang="scss">
	$countdown-height:44upx;

	.uni-countdown {
		padding: 2upx 0;
		display: inline-flex;
		flex-wrap: nowrap;
		justify-content: center;

		&__splitor {
			justify-content: center;
			line-height: $countdown-height;
			padding: 0 5upx;
            font-size: $uni-font-size-base;
		}

		&__number {
			line-height: $countdown-height;
			justify-content: center;
			height: $countdown-height;
			border-radius: $uni-border-radius-base;
			margin: 0 5upx;
			font-size: $uni-font-size-base;
			border: 1px solid #000000;
			font-size: $uni-font-size-sm;
			padding: 0 10upx;
		}
	}
</style>
